# femtomachine

> English word · Noun

## Definitions
1. A (hypothetical or fictional) machine on the femto scale; that is, a mechanical device whose size is on the order of the femtometer.

## Etymology
From femto- + machine, by analogy with micromachine, nanomachine, and so on.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/femtomachine